Vitim River Bridge, Siberia

This old railway bridge barely looks wide enough for pedestrians, let alone cars, but locals drive across it all the time in order to cross the Vitim River. During the Siberian winter, the bridge becomes even more challenging as the wood turns into an ice slick that provides no traction. One wrong move can easily send you plunging 50 feet into the water—because this bridge has no railings. See for yourself how terrifying it is to drive over the Vitim River Bridge in this video.